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Position: Home > Articles > Characteristics of Soil Particle Fractal Dimension After Formation of Water Area in Tail-streams of Shiyang River Bulletin of Soil and Water Conservation 2013,33 (6) 285-289

石羊河尾闾水面形成区土壤颗粒的分形特征

作  者:
刘淑娟;袁宏波;刘世增;刘虎俊;李发明;郭树江;王琪;郭春秀;李菁菁;魏怀东
单  位:
甘肃省荒漠化与风沙灾害防治重点实验室/省部共建国家重点实验室培育基地甘肃民勤荒漠草地生态系统国家野外科学观测研究站甘肃省治沙研究所
关键词:
青土湖;水面形成;土壤粒径分布;分形维数
摘  要:
青土湖是石羊河的尾闾湖,观测分析了距青土湖水面边缘0—500m范围内的土壤颗粒粒径分布、分形维数及其与土壤颗粒含量的关系。结果表明,0—20cm和20—40cm土层土壤颗粒的分形维数范围分别在2.370 8~2.879 6和2.359 0~2.750 9。在0~150m范围内,0—20cm土层土壤粒径分形维数与水面间距呈缓慢增加趋势,在150m处达到最大(2.879 6),随后逐渐降低;而20—40cm土层在0~100m范围内呈缓慢增加趋势,在100m处分形维数达到最大(2.750 9);土壤颗粒分形维数大小与土壤质地的细粒化有一致的变化趋势,且与大于0.05mm粒径含量呈极显著负相关关系,而与黏粒含量、粉粒含量呈极显著正相关关系。小于0.05mm粒径物质含量的增加和>0.05mm粒径物质含量的降低共同导致了土壤颗粒分形维数在水面形成150m范围内的增大,说明水面形成对土壤粒径的影响范围在0~150m。
译  名:
Characteristics of Soil Particle Fractal Dimension After Formation of Water Area in Tail-streams of Shiyang River
作  者:
LIU Shu-juan;YUAN Hong-bo;LIU Shi-zen;LIU Hu-jun;LI Fa-ming;GUO Shu-jiang;WANG Qi;GUO Chun-xiu;LI Jing-jing;WEI Huan-dong;Gansu Key Laboratory of Desertification Combating,Gansu Minqin National Studies Station for Desert Steppe Ecosystem,Gansu Desert Control Research Institute;
关键词:
Qintu Lake;;water area formation;;soil particle size distribution;;fractal dimension
摘  要:
Qingtu Lake is the tail-streams of Shiyang River.The soil particle size distribution,the fractal dimension and the relationships between the fractal dimension of soil particle size and fractal dimension within the distance of 0~500mof the edge of Qingtu Lake′s surface were analyzed.The results showed that:the range of fractal dimension of soil particles in 0—20cm,20—40cm soil layer were 2.370 8~2.879 6and 2.359 0~2.750 9respectively.Fractal dimension of 0—20cm soil layer had a slowly increasing trend in the range of 0~150mand reached the maximum(2.879 6)at 150m,then it gradually decreased;Fractal dimension of 20—40cm soil layer was slowly increasing within 100mand at 100mreached the maximum(2.750 9); The soil fractal dimension had a significant negative correlation with sand content,and significant positive correlation with proportion content of silt and clay.Both the increase of particle content with diameter< 0.05mm and decrease of particle content with diameter>0.05mm caused the increase of fractal dimension of soil particle size after the formation of water area.

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